Adjustable seat.



P. W. OOY.

ADJUSTABLE SEAT.

APPLICATION FILED JULY 3, 1909 1,052,042. Patented Feb. 4, 1913.

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COLUMBIA PLANOGRAPH coQwAsmNu'rnN. n. c.

F.. W. GOY.

ADJUSTABLE SEAT.

APPLIOATION IILED JULY 3, 1909.

Patented Feb. 4, 1913.

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COLUMBIA PLANOGRAPH CO..\VASHINUTON. D. c,

UNITED STATES PATENT OFFICE.

FREDERICK W. COY, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO CHARLES F.BROWN, TRUSTEE, OF READING, MASSACHUSETTS.

ADJUSTABLE SEAT.

Specification of Letters Patent.

Patented Feb. 4,1913.

Application filed July 3, 1909. Serial No. 505,871.

To all whom it may concern:

Be it known that I, FREDERICK W.'COY, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Adjustable Seats, of which the following is aspecification.

My invention relates to adjustable seats, stools, tables and the likebut particularly to duet benches for pianos, and its main object is toprovide an improved article of the latter class.

It is also the object of my invention to provide improved tiltingmechanism for the tops or seats of such articles, to improve the meansfor supporting said tops or seats with provision for vertical adjustmentand to otherwise improve upon the construction and mode of operation ofadjustable seats, benches, tables or the like.

To this end my invention consists in an article of the class described,having novel mechanism for supporting the tops or seats thereof, withprovision for vertical and tilting or angular adjustment, and in otherfeatures hereinafter described and pointed out.

The improved bench herein shown comprises a seat designed to accommodatetwo persons, said seat being supported by two posts adjustab-ly mountedin the base, and the whole being so arranged that the weight of the seatand of the persons thereon serves to secure the seat against downwardmovej ment, however it may be adjusted. The improved bench is also sodesigned that the mechanism contained within is entirely out of sight.

In the drawings,Figure 1 is a front elevation of a duet bench embodyingmy invention. Fig. 2 is a side elevation of the same. Fig. 3 is asection on the line 33 of Fig. 1, showing the seat portion of the benchin a raised position. Fig. 4 is a section on the line 44 of Fig. 1,showing the seat portion in a tilted position. Fig. 5 is an invertedplan View of one of the cam. plates which are attached to the seatport-ion of the bench. Fig. 6 is a section on the line 66 of Fig. 1,showing the base portion of I the bench in plan view. Fig. 7 is alongitudinal vertical section of the entire bench. Fig. 8 is an invertedplan view of the seat port-ion of the bench, showing the tiltingmechanism. Fig. 9 is a view similar to Fig.

of the base portion of the duet bench, which,

as herein shown, is provided wit-h legs'2.

3 is the seat portion thereof, which is movable angularly and verticallywith relation to the base. The body 1 of the base comprises arectangular frame to which is secured two cross bars 4, in both of whichlatter are formed sockets 5 to receive two upright seat-supporting posts6. Each post 6 is provided at its upper end with a head 7 made with ears8, pivoted at9, to ears 10, on a plate 11, the latter being secured tothe under side of the seat 3. This affords a ,hinged connection betweenthe seat and the supporting post. Interposed between each plate 11, andits head 7 is a ring 12 surrounding, and held in position by, the ears10 of the plate 11 around which it is rotated to tilt the seat 3', aswill be described later. On the ring 12 are two lugs 13 and 14 whichcooperate with two inclined planes or cam faces 15 and 16 on theadjacent plate 11 when the ring 12 is rotated so as to rock the plate 11on the pintle 9, thereby varying the angular relation of the seat to itssupporting post. Two lugs 17 are formed on the ring 12 which cooperatewith a stop 18 formed on the head 7 of the supporting post 6 to limitthe extent or rotation of the ring 12 so that the lugs 13 and 14 cannotbe forced beyond the tops of the inclined planes 15 and 16, therebypreventing the ring 12 from being turned back. A forked arm 19 is formedon each ring 12 and a bar 20' connects the two arms. The bar 20, at itscenter has a socket into which projects one arm of a lever 21, pivotedat 22 to the under part of the seat, the other arm thereof extendingthrough an opening in the side of the seat, wit-h a handle 23 on itsouter end. The lever 21 when operated by means of its handle 23 actsthrough the connecting bar 20 to rotate the two rings 12 around the ears10 simultaneously. When the seat is in a horizontal position the lugs 13are at the bottoms of the inclined planes 15, while the lugs 14 are atthe tops of the inclined planes 16. As the rings 12 are being rotatedand the relation between the lugs 13 and 14 is being reversed,

the seat 3 is being correspondingly tilted. It will be seen that theseat is securely held at any point within its range of tilting movement.Buffer washers 24 on the supporting posts 6, by engagement wit-h thetops of the sockets 5 of the cross bars 4, act as stops to limit thedownward movement of the seat 3 so as to leave sufficient space betweenthe seat 3 and the top of the body of the base portion 1 to permit itsbeing tilted, if desired, when at its extreme lowest position.

The two supporting posts 6 are connected at their lower ends by a bar 25to which are pivotally connected the lower ends of two links 26, theupper ends of each of said links 26 being pivoted at 27 to a clutch 28.The clutch 28 is, in turn, pivoted at 29 to a clutch-releasing arm 30which is fulcrumed at 31 to the cross bar 4 of the base 1. The clutch 28is provided with two jaws 32 and 33 embracing and cooperating with ahanger 34 which is of segmental form, concentric with the fulcrum 31,said hanger being pivoted at 35 to the cross bar 4. The seat is normallyheld against downward movement by the engagement of two clutches 28 withhangers 34, the clutches 28 being twisted around the pivots 29, by theweight of the seat so that their jaws 32 and 33 firmly grip the hangersand bind at 36 and 37 against the convex and concave edges of the latteras shown in F ig. 3. The two clutch-releasing arms 30 are integral witha rocker 38 jour' naled on the cross pieces 4 at 31. The rocker 38 atits middle has an arm 39 having at its outer end a yoke 40 within whichis pivoted a block 41. Through the block 41 extends the lower threadedend of a connecting rod 42 which is adjustably fastened to said block bynuts 43 and 44. At its upper end, rod 42 is made with an eye 45 throughwhich extends an arm 46 projecting from a rockshaft 47 journaled in twobrackets 48 secured to the under side of the seat 3. The rock-shaft 47extends from the eye 45 to the exterior of the seat opposite the handle23 of the lever 21, and is provided with a handle 50. A spring 49 holdsthe rock-shaft 47 in its normal position but when the latter is rockedagainst the tension of said spring 49, the arms 46 lift the connectingrods 42 and the rocker arm 39,thereby releasing both of the clutches 28simultaneously. When adjusting the seat 3 vertically, the operatorrelieves the weight from the clutch 28 by lifting the seat 3 slightlyand at the same time lifts the handle 50. This swings theclutch-releasing arms 30 downward on their fulcrums 31. Said arms 30swing the clutches downward on their pivots 27 thus breaking the hold ofthe clutch jaws 32 and 33 and bringing the inner face of jaw 32, whichis slightly concave, into parallel relation with the convex side of thesegmental hanger This leaves the clutches 28, and consequently the seat3, free to be moved vertically in either direction. The convex edges ofthe hangers may be made with teeth to insure positive engagement by thejaws of the clutches. This modified construction is shown in Fig. 11 inwhich 320 and 330 are the jaws of a clutch 280, and 340 is a toothedhanger cooperating with said jaws. A counter balance spring 51 isattached at one end to the rectangular frame of the body 1 and its otherend pulls upwardly against a pin 52 on the end of the arm 39 of therocker 38. This spring serves to nearly counterbalance the weight of theseat so as to allow the latter to be moved easily by the operator. Aplate covers the top of the body 1 and the mechanism within the latter,hiding it from view and protecting it from dust. The plate 53 also actsas a shield to protect the garments of the users of the duct bench fromcoming in contact with said mechanism.

I claim 1. A duet bench comprising a base, a seat having two postsprojecting through said base and having a bar connecting their lowerends, links connected to said bar, a hanger secured to the base adjacenteach post, a clutch cooperating with each of said hangers, the clutchesbeing operatively connected with said links, and means for controllingthe clutches.

2. A duet bench comprising a base, a seat having two posts projectingthrough said base and having a bar connecting their lower ends, linksconnected to said bar, a hanger secured to the base adjacent each post,a clutch cooperating with each of said hangers, the clutch-es beingoperatively connected with said links, and means for controlling theclutches, said means comprising a rocker arm carried by the base andmovable with the clutches, a rod connected with said rock-er arm, and arock shaft mounted in the seat and connected to said rod.

In testimony whereof I have ai'lixed my signature, in presence of twowitnesses.

FREDERTCK l/V. COY.

Witnesses C. F. Brown, Jae. H. CHURCHILL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C. 7

